Honestly, there isn't a precise equivalent. The world-building, characters, and plot of One Piece are quite special. Some manga in the same genre might have certain commonalities, but they don't reach the level of being an equivalent.
I'm not sure there's a direct equivalent. Each manga has its unique story and charm.
The One Piece anime is quite similar to the manga. Most of the key plot points and character developments are accurately represented.
Not that I know of. Usually, specific manga sites or platforms are dedicated to manga rather than having a direct equivalent to GetComics.
It's quite exciting and full of adventure. The storylines and characters are really engaging.
The manga for the Demon Slayer anime is simply called 'Demon Slayer: Kimetsu no Yaiba'. It's highly popular and well-regarded.
It's hard to pinpoint an exact equivalent as Kiss x Sis has a unique style and story. But some similar manga might have similar themes of complex relationships and comedy.
I think the roof piece manga is quite unique and not closely related to many others. It has its own style and storylines.
Due to the official Shueisha, One Piece manga was free worldwide. You could go to the official platform to read and watch the complete collection.
Starting from May 1, 2020, One Piece began to pay for viewing. Currently, there was no way to broadcast the full version of the movie for free.
The latest Battle Through the Heavens manga did not have a direct relationship with the original novel, so it was impossible to directly answer the question of which chapter was equivalent to the book. However, Battle Through the Heavens manga was based on a novel. There might be some differences between the chapter names of the manga and the novel. If one wanted to determine which chapter of the novel was equivalent to the manga, one would first need to determine the chapter name of the novel and then search for the corresponding manga chapter through a search engine or library.